The Spanish verb 'manar' comes directly from the Latin verb 'manare', meaning 'to flow' or 'spring forth'. The word has maintained remarkably consistent meaning and form over time, with only the expected shift from the Latin infinitive ending '-are' to the Spanish infinitive ending '-ar'. Today in Spanish, 'manar' means 'to flow' or 'emanate', particularly when referring to liquids flowing from a source.

A related Spanish word is 'emanar' (to emanate, issue forth), which is also derived from Latin 'manare' but with the addition of the prefix 'e-' meaning 'out'. This creates a more specific meaning of flowing outward or issuing forth from a source.

The English word 'emanate' is a cousin of Spanish 'manar', as it also derives from Latin 'manare', specifically from 'emanare' (to flow out). While Spanish preserved the simple form 'manar', English only kept the prefixed form 'emanate', which entered the language through Medieval Latin. Another related English word is 'permanent', which comes from Latin 'permanere' ('per-' + 'manere'), originally referring to something that continues to flow or remain throughout.